PredictionBook transitioning to read-only mode at the end of 2023 ( read more ).

On or before January 1, 2020, there will be at least one YouTube video with over 4 billion views.

Created by Vipul Naik on 2017-04-22; known on 2020-01-02; judged right by Vipul Naik on 2017-10-12.

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